Nut-lock



(No Model.)

F. O. BOSWELL. NUT LOCK.

No. 432,014. Patented July 15, 1890.

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UNITED STATES PATENT OFFICE.

FLETCHER ODELL BOSWELL, OF JERSEY SHORE, PENNSYLVANIA.

'INUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 432,014, dated July 15, 1890).

Application filed October 24, 1888.

To all whom it may concern:

Be it known that I, FLETCHER ODELL Bos- WELL, of Jersey Shore, in the county of Lycoming and State of Pennsylvania, have invented a new and useful Improvement in Nut-Locks, of which the following is a full, clear, and exact description.

This invention consists in an automatic lock-nut of novel construction, substantially as hereinafter described, and pointed out in the claim, the same being applicable-to bolts for uniting fish-plates and railroad-rails together and for other purposes.

Reference is to be had to theaccompanyin g drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure '1 represents a partly broken View of a bolt with its nut and locking device as applied to a railroad-rail and its fish-plates shown in horizontal section. Figs. 2 and 3 are transverse sections through the bolt upon the lines as 00 and y y, respectively, looking in reverse directions; and Fig. at, a View in perspective of the locking device of the nut detached.

A is the screw-threaded bolt applied to secure the railroad-rail sections B B and fishplates 0 0 together. This bolt has a longitudinal groove 1) formed in and along its screw-threaded portion, for a purpose that will be hereinafter described.

D is the nut, which is fitted to screw upon the bolt, and which is constructed on its inner side or face with a circular or other suitablyshaped recess 0 and upon its outer side orface with ratchet-teeth d.

E is the nut-locking device, made of steel, so as to be yielding, and which is in the form Serial No. 289,044. (No model.)

of a key adapted to fit within the longitudinal groove 1) of the bolt, and constructed at its inner end with an outwardly-projecting side lip c, which rests within therecess c of the nut, and further constructed at its outer end with a lateral outwardly-proj ecting bent nosepiece f, that operates as a pawl to engage with the ratchet-teeth d on the outer face of the nut, and serving as a spring-pawl.

Upon screwing up the nut D on the bolt it draws the key, E by its lip or head e up with it and along the groove 1) in the bolt, and as the nut is screwed up causes the spring or pawl part or nose-piecef of said key to engage with the ratchet-teeth d on the bolt, or with any one of them, and thereby holds the nut in place and from being accidentally unscrewed or working loose.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The combination of the bolt A, having a longitudinal groove 1) in its screw-threaded portion, the nut D, having a recess 0 on its innerface and ratchet-teeth (l on its outer face, and the spring nut-locking key E, adapted to slide along said groove as the nut is screwed up 011 the bolt, and provided with a lip or head 6 at its one end and a lateral curved cam-shaped spring pawl-like nose f at its opposite end, at right angles to the lip e and starting from the same side of the key, for operation together essentially as shown and described.

FLETCHER ODELL BOSWELL.

Witnesses:

ANDREW F. MARTIN, H. H. MARTIN. 

